morning, silence, one week after the children screaming and the madman shooting. sigh length across the country. silence in the oval office. and that ancient marker of mourning and remembrance, church bells. [ bells tolling ] >> reporter: the pain is still raw, the horror still fresh. but in washington the debate is already beginning and today a key voice, a powerful voice was at last heard. >> the national rifle association. >> reporter: wayne lapierre, the long-time executive vice president of the nra, took to the podium in washington just an hour or so after the national moment of remembrance. for a week, the nra had been silent, uncharacteristically silent as their opponents lambasted them. >> change, change, change! >> reporter: today, lapierre fired back. >> the only thing that stops a bad guy with a gun is a good guy with a gun.